- Definitions|2
- Thesaurus|218
- Abbreviations|0
| sleeper | |
| drone | |
| inactive(adjective, dull, quiet, weak, easy) | |
| energyless(adjective, dull, weak, easy, slow) | |
| goof off | |
| comatose(adjective, dull, quiet, weak, easy) | |
| impassive(adjective, dull, weak, easy, slow) | |
| laggard(adjective, dull, stupid, weary, apathetic) | |
| languid(adjective, dull, weak, easy, slow) | |
| lethargic(adjective, dull, quiet, weak, easy) | |
| sleepy(adjective, dull, quiet, slow, relaxed) | |
| slow(adjective, dull, quiet, weak, easy) | |
| snoozy(adjective, dull, quiet, weak, easy) | |
| somnambulist | |
| dawdle | |
| dawdler | |
| debilitated(adjective, dull, stupid, idle, weary) | |
| dilatory(adjective, dull, stupid, weary, apathetic) | |
| dormant(adjective, dull, stupid, idle, weary) | |
| dozy |
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| APA | Smart Define. (2015). sleepyhead thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/sleepyhead/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "sleepyhead thesaurus" https://smartdefine.org/sleepyhead/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, sleepyhead thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/sleepyhead/thesaurus/synonyms>. |
| MLA | Smart Define. "sleepyhead thesaurus" 13 April 2015. Web. 20 September 2026. <https://smartdefine.org/sleepyhead/thesaurus/synonyms> |